<?php // $Id: recent.php,v 1.34.2.3 2008/07/05 20:57:09 skodak Exp $

//  Display all recent activity in a flexible way

	require_once('../config.php');
	require_once('lib.php');
	require_once('recent_form.php');

	$id = required_param('id', PARAM_INT);

	if (!$course = get_record('course', 'id', $id) ) {
		error("That's an invalid course id");
	}

	require_login($course);

	add_to_log($course->id, "course", "recent", "recent.php?id=$course->id", $course->id);

	$context = get_context_instance(CONTEXT_COURSE, $course->id);

	$meta = '<meta name="robots" content="none" />'; // prevent duplicate content in search engines MDL-7299

	$lastlogin = time() - COURSE_MAX_RECENT_PERIOD;
	if (!isguestuser() and !empty($USER->lastcourseaccess[$COURSE->id])) {
		if ($USER->lastcourseaccess[$COURSE->id] > $lastlogin) {
			$lastlogin = $USER->lastcourseaccess[$COURSE->id];
		}
	}

	$param = new object();
	$param->user   = 0;
	$param->modid  = 'all';
	$param->group  = 0;
	$param->sortby = 'default';
	$param->date   = $lastlogin;
	$param->id	 = $COURSE->id;

	$mform = new recent_form();
	$mform->set_data($param);
	if ($formdata = $mform->get_data(false)) {
		$param = $formdata;
	}

	$userinfo = get_string('allparticipants');
	$dateinfo = get_string('alldays');

	if (!empty($param->user)) {
		if (!$u = get_record('user', 'id', $param->user) ) {
			error("That's an invalid user!");
		}
		$userinfo = fullname($u);
	}

	$strrecentactivity = get_string('recentactivity');
	$navlinks = array();
	$navlinks[] = array('name' => $strrecentactivity, 'link' => "recent.php?id=$course->id", 'type' => 'misc');
	$navlinks[] = array('name' => $userinfo, 'link' => null, 'type' => 'misc');
	$navigation = build_navigation($navlinks);
	print_header("$course->shortname: $strrecentactivity", $course->fullname, $navigation, '', $meta);
	print_heading(format_string($course->fullname) . ": $userinfo", '', 3);

	$mform->display();

	$modinfo =& get_fast_modinfo($course);
	get_all_mods($course->id, $mods, $modnames, $modnamesplural, $modnamesused);

	if (has_capability('moodle/course:viewhiddensections', $context)) {
		$hiddenfilter = "";
	} else {
		$hiddenfilter = "AND cs.visible = 1";
	}
	$sections = array();
	if ($ss = get_records_sql("SELECT cs.id, cs.section, cs.sequence, cs.summary, cs.visible
								 FROM {$CFG->prefix}course_sections cs
								WHERE cs.course = $course->id AND cs.section <= $course->numsections
									  $hiddenfilter
							 ORDER BY section")) {
		foreach ($ss as $section) {
			$sections[$section->section] = $section;
		}
	}

	if ($param->modid === 'all') {
		// ok

	} else if (strpos($param->modid, 'mod/') === 0) {
		$modname = substr($param->modid, strlen('mod/'));
		if (array_key_exists($modname, $modnames) and file_exists("$CFG->dirroot/mod/$modname/lib.php")) {
			$filter = $modname;
		}

	} else if (strpos($param->modid, 'section/') === 0) {
		$sectionid = substr($param->modid, strlen('section/'));
		if (isset($sections[$sectionid])) {
			$sections = array($sectionid=>$sections[$sectionid]);
		}

	} else if (is_numeric($param->modid)) {
		$section = $sections[$modinfo->cms[$param->modid]->sectionnum];
		$section->sequence = $param->modid;
		$sections = array($section->sequence=>$section);
	}

	switch ($course->format) {
		case 'weeks':  $sectiontitle = get_string('week'); break;
		case 'topics': $sectiontitle = get_string('topic'); break;
		default: $sectiontitle = get_string('section'); break;
	}

	if (is_null($modinfo->groups)) {
		$modinfo->groups = groups_get_user_groups($course->id); // load all my groups and cache it in modinfo
	}

	$activities = array();
	$index = 0;

	foreach ($sections as $section) {

		$activity = new object();
		$activity->type = 'section';
		if ($section->section > 0) {
			$activity->name = $sectiontitle.' '.$section->section;
		} else {
			$activity->name = '';
		}

		$activity->visible = $section->visible;
		$activities[$index++] = $activity;

		if (empty($section->sequence)) {
			continue;
		}

		$sectionmods = explode(",", $section->sequence);

		foreach ($sectionmods as $cmid) {
			if (!isset($mods[$cmid]) or !isset($modinfo->cms[$cmid])) {
				continue;
			}

			$cm = $modinfo->cms[$cmid];

			if (!$cm->uservisible) {
				continue;
			}

			if (!empty($filter) and $cm->modname != $filter) {
				continue;
			}

			$libfile = "$CFG->dirroot/mod/$cm->modname/lib.php";

			if (file_exists($libfile)) {
				require_once($libfile);
				$get_recent_mod_activity = $cm->modname."_get_recent_mod_activity";

				if (function_exists($get_recent_mod_activity)) {
					$activity = new object();
					$activity->type	= 'activity';
					$activity->cmid	= $cmid;
					$activities[$index++] = $activity;
					$get_recent_mod_activity($activities, $index, $param->date, $course->id, $cmid, $param->user, $param->group);
				}
			}
		}
	}

	$detail = true;

	switch ($param->sortby) {
		case 'datedesc' : usort($activities, 'compare_activities_by_time_desc'); break;
		case 'dateasc'  : usort($activities, 'compare_activities_by_time_asc'); break;
		case 'default'  :
		default		 : $detail = false; $param->sortby = 'default';

	}

	if (!empty($activities)) {

		$newsection   = true;
		$lastsection  = '';
		$newinstance  = true;
		$lastinstance = '';
		$inbox		= false;

		$section = 0;

		$activity_count = count($activities);
		$viewfullnames  = array();

		foreach ($activities as $key => $activity) {

			if ($activity->type == 'section') {
				if ($param->sortby != 'default') {
					continue; // no section if ordering by date
				}
				if ($activity_count == ($key + 1) or $activities[$key+1]->type == 'section') {
				// peak at next activity.  If it's another section, don't print this one!
				// this means there are no activities in the current section
					continue;
				}
			}

			if (($activity->type == 'section') && ($param->sortby == 'default')) {
				if ($inbox) {
					print_simple_box_end();
					print_spacer(30);
				}
				print_simple_box_start('center', '90%');
				echo "<h2>$activity->name</h2>";
				$inbox = true;

			} else if ($activity->type == 'activity') {

				if ($param->sortby == 'default') {
					$cm = $modinfo->cms[$activity->cmid];

					if ($cm->visible) {
						$linkformat = '';
					} else {
						$linkformat = 'class="dimmed"';
					}
					$name		= format_string($cm->name);
					$modfullname = $modnames[$cm->modname];

					$image = "<img src=\"$CFG->modpixpath/$cm->modname/icon.gif\" class=\"icon\" alt=\"$modfullname\" />";
					echo "<h4>$image $modfullname".
						 " <a href=\"$CFG->wwwroot/mod/$cm->modname/view.php?id=$cm->id\" $linkformat>$name</a></h4>";
			   }

			} else {

				if (!isset($viewfullnames[$activity->cmid])) {
					$cm_context = get_context_instance(CONTEXT_MODULE, $activity->cmid);
					$viewfullnames[$activity->cmid] = has_capability('moodle/site:viewfullnames', $cm_context);
				}

				if (!$inbox) {
					print_simple_box_start('center', '90%');
					$inbox = true;
				}

				$print_recent_mod_activity = $activity->type.'_print_recent_mod_activity';

				if (function_exists($print_recent_mod_activity)) {
					$print_recent_mod_activity($activity, $course->id, $detail, $modnames, $viewfullnames[$activity->cmid]);
				}
			}
		}

		if ($inbox) {
			print_simple_box_end();
		}


	} else {

		echo '<h4><center>' . get_string('norecentactivity') . '</center></h2>';

	}

	print_footer($course);

function compare_activities_by_time_desc($a, $b) {
	// make sure the activities actually have a timestamp property
	if ((!array_key_exists('timestamp', $a)) or (!array_key_exists('timestamp', $b))) {
	  return 0;
	}
	if ($a->timestamp == $b->timestamp)
		return 0;
	return ($a->timestamp > $b->timestamp) ? -1 : 1;
}

function compare_activities_by_time_asc($a, $b) {
	// make sure the activities actually have a timestamp property
	if ((!array_key_exists('timestamp', $a)) or (!array_key_exists('timestamp', $b))) {
	  return 0;
	}
	if ($a->timestamp == $b->timestamp)
		return 0;
	return ($a->timestamp < $b->timestamp) ? -1 : 1;
}
?>
